Telephone signaling mechanism



I PATENTED FEB/'23, 1904. 0. 0. LEE. TELEPHONE SIGNALING MECHANISM.

APPLIUATION FILED JAN. 11, 1900.

N0 MODEL.

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'rns RORRL': PETERs cc-, wzssamsrou, 2,.0.

a No. 752,909.

U iTED STAT S Patented February 23, 1904.

PATENT OFFICE.

TELEPHONE SIGNALING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 752,909, dated February 23, 1904.

l Application filed January 11, 1900. Serial No. 1,0645. No model.) i

- To all whom, it may concern.-

Beit known that I, OSCAR OLSEN LEE, a citizen of the United States, residing at Chicago, inthe county of Cook and State of Illinois,

' have invented a new and useful Telephone Signaling Mechanism, of which the following is a specification.

This invention relates to telephone signaling mechanism.

. The object of the invention is to provide a construction and arrangen ent of switching mechanism in connection with telephone sig':

'naling apparatus whereby the signal may be efiected automatically and without the use of a generator.

. A further object of the invention isto provide an arrangement of telephone signalingapparatus wherein a portion only of the same battery employed for energizing the signah circuit is used in the talking-circuit.

Other objects of the invention will. appear more fully hereinafter.

The invention consists, substantially in theconstruction, combination, location, and arrangement of parts, all as will be more fully hereinafter set forth, as shown in the accompanying drawings, and finally pointed out in the appended claims. i F

Referring to the accompanying drawings, and to the variousviews and reference-signs appearing thereon,Figure 1 is a diagram showing the electrical circuits and relative arrange ments of. the various-parts of the apparatus at a subscribersstation; Fig. 2 is a brokenviewcompletion of the signaling-circuit. Fig. 3 is in detail, somewhat diagrammatic, showing the position of the receiver-hook during the a view similar to Fig. 2, showing the arrangement of circuits after the signaling-circuit has been broken and with the talking-circuit com-- ranged to exert its tension upon lever A in a direction to rock said lever'about its pivot B, the tension of said'spring being overcome by the weight of the receiver when imposed upon *the hook G of said 1ever'.., i E designates an extension of lever A beyond its point of pivotal support.

F, F and G, designate contact-springs with which the extension E cooperates.

' S designates a signal-bell.

O ()designate battery-cells. I M designates an induction-coil; T, the softiron core of said coil; N, a vibrator or. rheotome; N", the contact-screw of said rheotome ,or circuit-breaker, and Q a transmitter.

Suitably mounted upon but insulated at I from lever A is an arm H, arranged to project between contactspringsJ J ,suitably insulated;

from eachother and secured by screws K K. The contact-springs J J are spacedlapart, so I as to provide su'flicient room therebetween to receive the arm H without contact with either of said springs when lever A is in its lowermost or depressed position; but when said lever is rocked toward raised position-was, for

instance, when the receiver is removed from hook C-the arm H makes contact with both springs J J in passing, and when the lever A H passes'beyond the ends of said springs J J to again break electrical connection therebetween, reference-sign L designating the point at which simultaneous contact is made with 'both springs J J by arm H. v

Having now described or referred to the vaconneotions thereof. First, when the receiver. is upon its-hook and lever A is in its lowermost position circuit is broken-{between the contact-springs J Jzand a circuit completed between contact-spring G and anarm E of wire V, contact spring G, extension E of lever is in its extreme uppermost position arm rious parts, I will now explain the electrical;

l A, to the pivot B of said lever, through wire P wire P to point R, which indicates the ter- 'minal of the other line-wire. Thus the signalcircuit is completed, showing the apparatus in condition ready to receive a signal from the ing the signal or bell circuit above traced. As

the rocking movement of lever A continues the arm H thereon, operating between the contact-springs J J, arrives at the point Land makes simultaneous contact between said 7 springs, thereby bridging the same, thereupon completing the local-battery circuit as follows:

from 'one terminal W of the battery 0 0, through wire P, the circuit-breaker N, wire P, to contact J, arm H, contact-spring J, wire P, the primary winding of induction-coil M, to wire P, to the terminal W of battery 0 0. At the moment of completion of the above circuit by the bridging of the space between contact-springs J J f the extension E of lever A makes contact with spring F, thereupon completing the following circuit: from binding-post R, wire S, receiver D, wire S, secondary winding of induction-coil M, wire S, contact-spring F, extension E of lever A, pivot B of said lever,wire P, wire P, to binding-post R and to the other line-wire. The making of the local-battery circuit through the bridging of the space between the contactsprings J J operates the rheotome or vibrating circuit-breaker N at a high rate of speed, thereby inducing electrical pulsations in the secondary circuit of the induction-coil. The windings of said secondary coil being at the same instant included in the line-circuit, a signal-current is sent to line and which current utilizes in the production thereof the full strength of all the cells of the local battery, thereby insuring a positive and efiicient actuation of the signal device"such, for instance, as a drop at the switchboard, or a polarized bell, or a harmonic signal from the receiver of another telephone, or other suitable signal device at the said distant station or the central station; The conijnued rocking movement of lever A toward its extreme upper position carries arm H free or clear of contact with springs J J,} thereby breaking the signal-circuit above referred to and which includes.thecontact-springs J J. Such parallel movement, however, of leverAdoes not break the circuit between contact-spring F and-the extension E of the receiver-lever. Therefore the circuit of the secondary of induction-coil M as'above traced remains completed. How

ever, when lever A reaches its extreme upper limit of moveinent the extension E of said lever makes contact with spring F, thereupon completing the following circuit: from the terminal W of a portion only of the battery as, for instance, from only one of the elements or cells of such battery-through wire P, spring F, arm E of the extension of lever A, wire- P transmitter Q, wire P to primary winding of induction-coil M and wire I and the other terminal W of the same portion or cell of battery 0 O. This constitutes the talking-circuit, and hence it will be seen that I utilize-in the talking-circuit a portion only of the same battery-power employed in the signaling-circuit.

When a signal is sent-that is, when the signaling-circuit is completed by the raising of the receiver from its supporting-lever A- it is obvious that said lever A may be held in position to close the circuit between springs J J as long as desired to prolong the signal, thereby giving the vibrator sufficient time to interrupt the current, and when the signal has been given and the receiver-weight en tirely relieved from its supporting-lever the apparatus is placed in. condition for talking and with only a portion of the battery-power in circuit.

Having now set forth the object and nature of my invention and a construction and arrangement of parts embodying the principles thereof, and having set forth and described the purpose, function, and mode of operation thereof, what I claim as new and useful and of my own invention, and desire to secure by Letters Patent of the United States, is-

1. A telephonevsignaling apparatus, come.

prising a local battery, an induction-coil, a rheotome or vibrator therefor, a receiver-support and an electric signaling apparatus, a circuit from said battery leading through the primary of the induction-coil. and through the rheotome thereof, said circuit being made by i the movement of the receiver-lever, and additional circuits controlled by said -receiver support, normally throwing said signaling apparatus into circuit'with the line-wires, and arranged to throw the secondary of the 'induc; tion-coil into circuit with said linewires and a portion of the said batterytogether with thetransmitter, into circuit with said primary coil at the limit of upward movement of the receiver-support, as and for the purpose set forth.

'2. A telephone signaling apparatus, com-r prising a local battery, an induction-coil, a rheotome or v brator therefor, a receiver-support and an electric signaling apparatus, a

circuitfrom said battery leading through the primary of the induction-coil, and through the rheotome thereof, said circuit being made wiresybut said battery and induction-coil are by the movement of the receiver-lever,v conthrown into atalking-circnit upon movement IO 1 tacts on the receiver-support, and a series of of said receiver-support t0 itslimit of upward coiiperating springs connected respectively to movement, as and for the purpose set forth. the secondary of the induction-coil, the sig- OSCAR OLSEN LEE.

nal apparatus, and an intermediate point in Witnesses:

the electric battery, whereby the signaling HWM ASHTON, apparatus is normally in circuit with the line- J. H. DEVON. 

